• 대한수학회보
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• 제34권4호
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• pp.637-643
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• 1997

The group $V(ZS_3)$ of units of augmentation 1 in the integral group ring $ZS_3$ is characterized as the free product of $C_2$ and $S_3$, where $C_2$ is the cyclic group of order 2.

• 대한자원환경지질학회:학술대회논문집
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• 대한자원환경지질학회 2007년도 춘계 지질과학기술 공동학술대회
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• pp.534-536
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• 2007

• 천문학회보
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• 제24권1호
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• pp.35-35
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• 1999

• Journal of the Korean Statistical Society
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• 제17권1호
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• pp.24-29
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• 1988

The asymptotic distribution of the sample partial autocorrelation terms after lag p of an AR(p) model has been shown by Dixon(1944). The derivation is based on multivariate analysis and looks tedious. In this paper we present an interesting contour-integral derivation.

• East Asian mathematical journal
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• 제39권3호
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• pp.299-303
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• 2023

The aim of this note is to provide three derivations of the well-known Gregory-Leibniz series for π via a hypergeometric series approach.

• 한국물환경학회지
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• 제26권4호
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• pp.700-706
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• 2010

Along the 4 major rivers in korea, there are automatic water quality monitoring (AWQM) stations to immediately respond to any pollution incident. Real-time data (temperature, DO, pH, EC and TOC) collected at each station were statistically treated to exclude outliers and keep valid data using Dixon's test and Discordance test. These applied methods were compared in terms of the number of the outliers sorted out. There was no significant difference between these methods. On the other hand, more outliers were sorted out from EC and TOC data, comparing with other water quality items. EC data did not show partly any variation for a long time at H station. If measured signal does not exceed ${\pm}0.001mS/cm$ from the sectional mean, the signal should be treated as normal data. Therefore, another routine was added to the data screening system, some data which were removed as outlier were restored.

• 한국균학회지
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• 제14권2호
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• pp.101-107
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• 1986

The properties of carboxyl proteinase which was contained in Poria cocos (Schw.) Wolf were investigated by means of the purification with 0.65 ammonium sulfate saturation, DEAE cellulose and Sephadex G-75 gel filtration. This enzyme was found to hydrolyze only peptide bond between glutamyl-L-tyrosine of carbobenzoxy-L-glutamyl-L-tyrosine among the synthetic substrates of carbobenzoxy-L-glutamyl-L-tyrosine, hippuryl- L-phenylalanine and hippuryl-L-arginine. This enzyme was inhibited by $Zn^{+2},\;Fe^{+2},\;Ca^{+2},\;CN^{-1},\;P_2O_7^{-4}$ ions, but stimulated by $Hg^{+2}$ ion. Also, this enzyme was inhibited by organic compounds such as L-lysine, L-phenylalanine, hippuryl-L-phenylalanine, diazoacetyl-DL-norleucine methyl ester (DAN) and 1,2-epoxy-3-(P-nitrophenoxy)propane(EPNP). In particular, the activity was inhibited by L-lysine till 20 minutes of preincubation time rapidly, and by DAN in the presence of $Cu^{+2}$ ion more rapidly after 30 minutes than DAN in the absence of $Cu^{+2}$ ion. L-Lysine was found to be a competitive inhibitor and its $K_i$ value was determined to be 0.12 mmole by Dixon plot.

• 응용통계연구
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• 제27권7호
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• pp.1115-1123
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• 2014

제 1상 임상시험의 주목적은 시험약의 독성을 평가하여 부작용을 최소화하고 안전하게 투여할 수 있는 적정 용량인 최대허용용량(Maximum Tolerated Dose; MTD)의 추정이다. 기존에 최대허용용량 추정 방법에는 SM방법(Storer, 1989; Korn 등, 1994), ATD방법(Simon 등, 1997) 그리고 DM방법(Dixon과 Mood, 1948) 등이 있다. 본 논문에서는 초기 가속 단계를 적용하여 약효가 없는 낮은 용량에 많은 피험자들이 배정되는 점을 보완하고, 이 초기 가속 단계로 빠르게 용량을 증가함으로 인해 떨어진 안전성을 개선하기 위해 용량감량을 허용하는 방법을 적용시켜 MTD 를 추정하는 방법을 제안하였다. 기존의 방법들과 본 논문에서 제안한 방법을 모의실험을 통해 비교하였다.

• 한국IT서비스학회지
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• 제15권1호
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• pp.167-178
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• 2016

Spectrum sensing in cognitive radio (CR) has a great role in order to utilize idle spectrum opportunistically, since it is responsible for making available dynamic spectrum access efficiently. In this research area, collaboration among multiple cognitive radio users has been proposed for the betterment of detection reliability. Even though cooperation among them improves the spectrum sensing performance, some falsely reporting malicious users may degrade the performance rigorously. In this article, we have studied the detection and nullifying the harmful effects of such malicious users by applying some well known outlier detection methods based on Grubb's test, Boxplot method and Dixon's test in cooperative spectrum sensing. Initially, the performance of each technique is compared and found that Boxplot method outperforms both Grubb's and Dixon's test for the case where multiple malicious users are present. Secondly, a new algorithm based on reputation and weight is developed to identify malicious users and cancel out their negative impact in final decision making. Simulation results demonstrate that the proposed scheme effectively identifies the malicious users and suppress their harmful effects at the fusion center to decide whether the spectrum is idle.

• 대한의용생체공학회:학술대회논문집
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• 대한의용생체공학회 1992년도 추계학술대회
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• pp.22-25
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• 1992

화학적 이동성을 이용하여, 생체의 경우 지방질의 영상 혹은 물성분의 영상을 얻을 수 있다. 여러 가지 기술을 사용하여 분리된 성분의 자기공명 영상을 얻었다. Dixon의 방법은 두 번의 영상실험을 하여 지방질 영상과 물성분 영상을 구분할 수 있으며, 부분적 자기장의 불균질성에 영향을 적게 받고 다층 영상법에 용이하게 적용할 수 있다. CHESS와 SECSI 방법은 한번의 영상실험으로 물 또는 지방질 영상을 획득할 수 있다. 그러나 부분적 자기장의 불균질성에 영향을 많이 받으며, 다층영상법에 적용하기에는 어려운 점이 있다. 화학 성분의, 즉 지방질과 물성분의 분리의 척도가 되는 지방질 신호대 물성분신호 비에 있어 SECSI 방법이 가장 우수함을 보였다.